GNU - Just a glance

I've met this word 'GNU', in many places as I'm living in this IT world. But I've never thought what is it and what does it stands for. I've been thinking that its convention or may be an organization which standardize the IT protocols and stuff like ISO & IEEE, or an organization which provides open source licences. Today only got a clear knowledge what it is.

GNU stands for GNU's not Unix! 

Hide your texts behind a photo

How many of you guys are known that we can hide our text documents as an image file? Do you think that we need a special graphic processing software to do that? Do you think that it will be an expensive way?

Here, the answer is simply and clearly "NO!". You can get it done with your Windows' CMD command lines.